More details on what you used, and how you did it, would be welcome.
it's a 1,1 flashed to 2,1 and has 5355's and a 560Ti 448 with an Arctic Cooling Accelero Twin Turbo 2. The ram is not apple standard it has the smaller heat sinks. I added the final final 4 sticks giving 8 in all and I was playing around inside and realized the ram was warmer than I was comfortable with.
I had the Sharkoons left over from the Rad on the Hackintosh so I pulled the front fan assembly took one look and knew they'd fit. The fan assembly is powered by a connector that leads to two 4 pin PWM connectors one for the top one for the bottom. I cut the rubber mounts mounted the new fans with rubber mounts connected the connect and we're off.
The rear is just a 4 pin MoBo header. I pugged the fan controller into the 4 pin plugged the fan into the controller and remounted.
Idle CPU temps via SMC fan control is 29ish degrees, yes> /dev/null on all 8 cores for 45min yielded 45 deg. I don't figure thats too bad for a 6 year old heavily modified computer. I going to stop searching for a socket 771 water block now for sure.